Car does not set back to idle for 2-3 seconds.
Hi Guys,
Something weird is happening with my VRX-2 when i give it full throttle and release it so it runs back to idle the servo returns back to idle position. The carburetor also fully shuts of so no air is getting through from what i can see. Also it seems to be running still on half throttle but only for a few seconds, it seems to be burning fuel as well. Not come across this problem before at 1st i thought it may be a radio problem but its not and nothing is keeping the air intake open. As far as i can see there must be some sort of air leak in the carburetor, but it is also burning fuel. Any ideas? |
use the search button...or look at the top of this page under the "tuning bible"...but sounds as if the low end is rich and high end is a little lean and then loading up after a couple seconds dropping the idle down...from what it sounds like you need torichen up the op end a coule hours and lean out the low end until you get a steady "higher then normal idle" and then re adjust your idle speed screw to drop the idle down.
Ryan |
If the throttle feels like it's hanging up after a full throttle run you're probably lean on the high side needle; I had the same issue a few weeks ago. I was also too rich on the bottom and was seeing temps in the 215 range even though I was lean up top.
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Originally Posted by blktransam
(Post 6513904)
use the search button...or look at the top of this page under the "tuning bible"...but sounds as if the low end is rich and high end is a little lean and then loading up after a couple seconds dropping the idle down...from what it sounds like you need torichen up the op end a coule hours and lean out the low end until you get a steady "higher then normal idle" and then re adjust your idle speed screw to drop the idle down.
Ryan |
he cant tune a motor. but he wants to set the world record for the farthest jump?
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sounds like it...
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+2 on the top too lean. When the throttle is wide open the high speed needle descides how much fuel goes to the engine if there is not enough then when you let off it will have a lean eeeeeeeeeeee sound until it has enough fuel to drop the idle down. Try richening 1 hour and then run it for 2 - 3 minnand recheck. Make sure you always run the car inbetween carb adjustments.
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It probably screams down the straights (or on the street) though !! ;)
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high end needle controls the fuel at wot, low end controls fuel at idel and at take off...liek I said it prb. a combination of lean top end and rich low end.
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Lean the idle gap and LSN... Don't mess with HSN
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Whats wrong with asking?
Originally Posted by coviello
(Post 6514274)
he cant tune a motor. but he wants to set the world record for the farthest jump?
Nothing wrong with wanting to learn |
Thanks
Hi All,
Ill have a play around with the HSN i know its set to lean because the engine overheats and hesitates after a tank of fuel. Didn't think this would have an affect on the return to idle. Thanks Guys |
Originally Posted by xnitrorc
(Post 6514505)
Hi All,
Ill have a play around with the HSN i know its set to lean because the engine overheats and hesitates after a tank of fuel. Didn't think this would have an affect on the return to idle. Thanks Guys once you find a balance in the carb (novas) it is usually pretty close to in the ball park and may need minor tweaks either way but the balance will stay pretty close . such as lean the high speed and richen low speed or richen high speed and lean low speed . adjust idle to suit . |
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